1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
allsm [11]
3 years ago
6

Ratio And Proportion

Mathematics
1 answer:
mel-nik [20]3 years ago
7 0
1)
Data:

\frac{boys}{girls} =  \frac{2}{5}
Total pupils = 140

Solving:

140* \frac{2}{5} =  \frac{280}{5} = 56boys
140 - 56 = 84girls


2)

Data:

\frac{boys}{girls} = \frac{5}{4}
Total boys =120

g* \frac{5}{4} = 120
\frac{5g}{4} = 120
5g = 120*4
5g = 480
g =  \frac{480}{5}
g = 96

Answer: 96 girls
You might be interested in
Xmp-qite-xsy. jdjkddkrjrhfhhrjtjgrhrjrjdhhdbfhhthjf I have to do it​
Sergeu [11.5K]

Answer:

ok xmp-qite-xsy. jdjkddkrjrhfhhrjtjgrhrjrjdhhdbfhhthjf I have to do it

4 0
2 years ago
Read 2 more answers
A researcher reports a 98% confidence interval for the proportion of Drosophila in a population with mutation Adh-F to be [0.34,
Fantom [35]

Answer:

0.34 \leq p \leq 0.38

For this case we can conclude that with 98% of confidence the true proportion of Drosophila in a population would be between 0.34 and 0.38.

But that doesn't means that we have 98% of PROBABILITY that the true proportion would be between 0.34 and 0.38, because we are constructing a confidence interval with sample data and we can't analyze this using probability.

Then the best answer is:

2. False

Step-by-step explanation:

For this case we have a confidence interval for the proportion of Drosophila in a population with mutation Adh-F to be given by:

0.34 \leq p \leq 0.38

For this case we can conclude that with 98% of confidence the true proportion of Drosophila in a population would be between 0.34 and 0.38.

But that doesn't means that we have 98% of PROBABILITY that the true proportion would be between 0.34 and 0.38, because we are constructing a confidence interval with sample data and we can't analyze this using probability.

Then the best answer is:

2. False

3 0
3 years ago
Mateo built the skateboard ramp below and filled it with pebbles to make it more stable.
bagirrra123 [75]

Answer:

The shape can be broken into a rectangular prism and a triangular prism.

The volume of the ramp is 24 feet cubed.

Step-by-step explanation:

The ramp has a rectangular prism and triangular prism. The combined shape makes the ramp.

The volume of a rectangular prism = Bh

where

B = base area

B = length × width

h = height

volume = 1.5 × 4.8 × 2 = 14.4  ft³

The volume of a triangular prism = base area + slant height

volume = 1/2 b × h × l

where

b = base of the triangle

h = height of the triangle

l = slant height of the prism

volume = 1/2 × 2 × 2 × 4.8 = 19.2/2 = 9.6  ft³

The volume of the ramp = 14.4 + 9.6 = 24 ft³

5 0
3 years ago
Read 2 more answers
A Chevy Malibu has a fuel capacity of 18.5 gallons. This vehicle averages 666 miles per tank. Assume the relationship between fu
Nuetrik [128]

Answer:

180 miles

Step-by-step explanation:

Step one:

capacity of tank= 18.5gallons

vehicle averages 666 miles per tank.

Hence, the vehicle can travel 666 miles on 18.5 gallons

Required

The distance covered on 5 gallons

Step two:

vehicle can travel 666 miles on 18.5 gallons

the vehicle will go x miles on 5 gallons

cross multiply we have

5*666= 18.5*x

3330=18.5x

divide both sides by 18.5

x= 3330/18.5

x=180 miles

5 0
3 years ago
7/8m+9/10-2m-3/5<br> Combine like terms to create an equivalent expression.
stich3 [128]

Answer:

-1.123m+0.3

or in fraction form -9/8m+3/10

Step-by-step explanation:

first you subtract 7/8 from 2

then you subtract again 9/10 from 3/5

4 0
3 years ago
Other questions:
  • A new office building in town has x2 + 4 floors. Each floor is 3x2 – 5 feet high. Which expression shows the total height of thi
    14·1 answer
  • A hyperbola is the set of all points in a plane such that the absolute value of the difference of the distances from two fixed p
    9·1 answer
  • Which expression means 7 more than a number?
    11·1 answer
  • PLEASE HELP, I’ve been stuck on this question for the longest and no know it’s simple but my brains off so :/
    14·1 answer
  • The equation y = 11x describes the amount of money Louis earns, where x is the number of hours he works and y is the amount of m
    5·1 answer
  • HELPPPPPPPPPPPPPPPPPPP
    10·1 answer
  • The volume of the triangular block is 4 cubic inches.
    15·2 answers
  • For the right triangles below, find the exact values of the side lengths b and d.
    10·1 answer
  • HELPP MEE PLEASEE! ILL TRY TO MARK U BRAINLIEST IF PEOPLE AINT SELFISH AND USE UP THE ANSWER BOXES
    7·1 answer
  • Which one is this please answer it and get thanks from me if ur right
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!